KOLI PUN BOOK4. Heights and distances :From a point on the grhovering at some height abeint P on the ground, the angles of elevation of the top of a 20m tall building and of a helicopter,at some height above the top of the building are 30 and 60° respectively. Find the height atwhich the helicopter is hovering. (above the ground)

KOLI PUN BOOK4. Heights and distances :From a point on the grhovering

1.	KOLI PUN BOOK4. Heights and distances :From a point on the grhovering at some height abeint P on the ground, the angles of elevation of the top of a 20m tall building and of a helicopter,at some height above the top of the building are 30 and 60° respectively. Find the height atwhich the helicopter is hovering. (above the ground)
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